HARPER, OREGON

Period of Record General Climate Summary - Heating Degree Days

Station:(353666) HARPER 1 S
From Year=1919 To Year=1975
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	1215	913	746	492	259	86	9	24	195	508	859	1118	6424
60	1060	772	591	345	140	28	2	6	95	356	709	963	5066
57	967	687	498	261	86	12	0	2	56	269	619	870	4327
55	905	631	437	209	59	6	0	0	38	215	559	808	3868
50	750	490	287	103	19	1	0	0	11	106	411	654	2831

Heating Degree Day units are computed as the difference between the base temperature and the daily average temperature. (Base Temp. - Daily Ave. Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is below the base temperature. Negative numbers are discarded. Example: If the days high temperature was 65 and the low temperature was 31, the base 50 heating degree day units is 50 - ((65 + 31) / 2) = 2. This is done for each day of the month and summed.
Table updated on Oct 31, 2012
Months with 5 or more missing days are not considered
Years with 1 or more missing months are not considered

Western Regional Climate Center, wrcc@dri.edu